At macosxhints.com: A table of special Apple symbols and their values:
a table of symbols used in OS X menus to represent special and modifier keys
The table includes all the obvious characters such as Command and Option, and also the circle with arrow (Esc: ⎋), up and down arrows, Eject (⏏) etc. It also includes how to create these things in HTML.
Very handy for writers.
[Thanks inner.geek: My del.icio.us bookmarks this week.]